Concrete bridge unit



FIG. 1 is a perspective view of a first embodiment of a concrete bridge unit;

FIG. 2 is a front elevation of the concrete bridge unit of FIG. 1;

FIG. 3 is a side elevation of the concrete bridge unit of FIG. 1;

FIG. 4 is a perspective view of a second embodiment of a concrete bridge unit;

FIG. 5 is a front elevation of the concrete bridge unit of FIG. 4;

FIG. 6 is a side elevation of the concrete bridge unit of FIG. 4;

FIG. 7 is a perspective view of a third embodiment of a concrete bridge unit;

FIG. 8 is a front elevation of the concrete bridge unit of FIG. 7;

FIG. 9 is a side elevation of the concrete bridge unit of FIG. 7;

FIG. 10 is a perspective view of a fourth embodiment of a concrete bridge unit;

FIG. 11 is a front elevation of the concrete bridge unit of FIG. 10;

FIG. 12 is a side elevation of the concrete bridge unit of FIG. 10;

FIG. 13 is a perspective view of a fifth embodiment of a concrete bridge unit;

FIG. 14 is a front elevation of the concrete bridge unit of FIG. 13;

FIG. 15 is a side elevation of the concrete bridge unit of FIG. 13;

FIG. 16 is a perspective view of a sixth embodiment of a concrete bridge unit;

FIG. 17 is a front elevation of the concrete bridge unit of FIG. 16;

FIG. 18 is a side elevation of the concrete bridge unit of FIG. 16;

FIG. 19 is a perspective view of a seventh embodiment of a concrete bridge unit;

FIG. 20 is a front elevation of the concrete bridge unit of FIG. 19;

FIG. 21 is a side elevation of the concrete bridge unit of FIG. 19;

FIG. 22 is a perspective view of an eighth embodiment of a concrete bridge unit;

FIG. 23 is a front elevation of the concrete bridge unit of FIG. 22;

FIG. 24 is a side elevation of the concrete bridge unit of FIG. 22;

FIG. 25 is a perspective view of a ninth embodiment of a concrete bridge unit;

FIG. 26 is a front elevation of the concrete bridge unit of FIG. 25;

FIG. 27 is a side elevation of the concrete bridge unit of FIG. 25;

FIG. 28 is a perspective view of a tenth embodiment of a concrete bridge unit;

FIG. 29 is a front elevation of the concrete bridge unit of FIG. 28;

FIG. 30 is a side elevation of the concrete bridge unit of FIG. 28;

FIG. 31 is a perspective view of an eleventh embodiment of a concrete bridge unit;

FIG. 32 is a front elevation of the concrete bridge unit of FIG. 31;

FIG. 33 is a side elevation of the concrete bridge unit of FIG. 32;

FIG. 34 is a perspective view of a twelfth embodiment of a concrete bridge unit;

FIG. 35 is a front elevation of the concrete bridge unit of FIG. 34; and,

FIG. 36 is a side elevation of the concrete bridge unit of FIG. 34. 

CLAIM The ornamental design for a concrete bridge unit, as shown and described. 